A new cooperative detection technique with malicious user suppression

Authors:
Tingting Zhao;Yuping Zhao
Affiliations:
State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, P.R. China;State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, P.R. China
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

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Abstract

Spectrum detection for vacant bands is one of the key techniques in cognitive radio (CR) systems. Cooperative detection outperforms single user detection in many aspects. The existence of malicious user could severely degrade the performance of cooperative CR systems. In this paper, a new cooperative detection scheme with malicious user suppression is proposed, which has lower complexity and better performance compared with the existing one. Simulation results show that when 25% users in the system are malicious, our proposed method can introduce more improvement of missed detection probability by nearly 20%.